Duplicating defect-tracer.



No. 784,633. PATENTED MAR. 14', 1905. B. M. SGHANTZ.

DUPLIGATING DEFECT TRACER.

APPLIOATION FILED JUNE 13,1904.

Afr/37155555 UNITED STATES Patented March 14, 1905.

EDWIN M. SCHANTZ, OF ZIMMERMAN, OHIO.

DUPLICATING DEFECT-TRACER.

SPECIFICATION forming part of Letters Patent No. 784,633, dated March 14, 1905. Application filed June 13,1904. Serial No. 212,394.

To all 1071/0722, zit may concern:

Be it known that I, EDWIN M. SoHAN'rz, a citizen of the United States, residing at Zimmerman, Greene county, State of Ohio, have invented certain new and useful Improvements in Duplicating Defect-Tracers; and I do declare the following to be a clear, full, and exact description thereof, attention being called to the accompanying drawings, with the reference characters marked thereon, which form also a part of this specification.

This invention relates to improvements on a device called a duplicating defect-tracer, as described in Patent No. 7 53,005, issued to me on February 25, 1904. That particular implement, as well as the one now in consideration, was intended for use in connection with lumber which is subdivided to be cut up into smaller piecesso called "dimension stuff.- In such work subdividing-lines are run to guide the saw in cutting, which lines may be produced by ordinary means usually at handsquares, straight-edges, angles, &c. or aided by either of the marking-machines patented to me on July 28, 1903, No. 734,755, and on March 1, 1904, No. 7 53,435.. The particular use of that implement, as well as the present one, was to mark and represent by suitable lines on one side of a board or piece of other material of limited thickness and in exact location thereon the defects located on the other side, so that one side of the board would simultaneously show all defects present on both sides, the defects on the other side being represented by the marking-lines mentioned, while the defects on the side under observation appear as they are and show for themselves. The object was for the operator to have before him all defects present on both sides while he runs the marking-lines along which such material is to be subdivided and subsequently cut, thus permitting him to place such lines intelligently and with due consideration of the location of such defects, so as to avoid them, and particularly those on the under side of the board, which do not penetrate and which otherwise would not be noticed while the marking-lines are run on one side unless the board were frequently turned over. The particular machine of the patent, as well as the improved one presented here, operates substantially in this manner, that by means of a tracing-point all defects on one side of the board are circumscribed. A marking-point is connected to this tracing-point by mechanism which operates in a manner that all motions of the tracing-point are represented on the other side by visible lines. After the entire board is gone over in this manner and all defects are traced the same is now ready to receive the marking or cutting lines along which the board is subdivided and subsequently cut up. For such purpose the board is turned over so that the side on which the marking-point previously marked the defects as they appear on the other side comes now uppermost. This brings now before the operator the real defects on the side turned up, and at the same time the defects on the other side are also before him, being represented by the lines produced by the marking-point while the same followed and copied the motions of the tracing-point previously used on the other side. It is clear now that the lines to mark the cuts may be intelligently run and a board subdivided to best advantage, since all defects are simultaneously visible on one side in reality and those from the under side as represented by lines.

The present invention consists of improvements in the means whereby the implement is supported as a whole for use during manipulation.

In the following specification, and particularly pointed out in the claims at the end thereof, is found a full description of this improved implement, together with its manner of use, parts, and construction, which latter is also illustrated in the accompanying drawings, in which Figure 1 shows a top view of the implement and a suitable support or table on which the lumber rests while being held for marking the defects thereof. Fig. 2 is a vertical cross-section on line 2 2 of Fig. 1, and Fig. 3 is an enlarged side view of the implement with parts thereof in section.

To facilitate comparison, similar and corresponding parts have been provided with the same reference characters as are used in the previous patent.

and 11 are two points, of which the latter should be of a material which in its use produces a line such as is done by lead-pencils, chalk, carbon, or any other similar prepared material, permitting thus a visible marking-line to be run around defective spots. Point 10 is used to merely trace or circumscribe such spots and may therefore be simply a steel-pointed tracer. 1 prefer, however, to have it of the same material as point 11, so that its use also produces avisible line, which prevents omissions and greatly facilitates and favors quick work. These points are directed toward each other and carried at the outer ends of two arms 12 and 13, to which theyare secured by suitable holders 1 1 in a manner customary in such devices. These arms are pivotally secured to a head 15, which is substantially a hollow cylinder. The same is attached to a hub 16, from which it projects, and which hub is pivotally mounted, by means of a bolt 32, on the end of an arm 33. This latter has also a hub 34. atits other end and by means of a pivot 17 is attached thereat to a bracket 18, to which this pivot is held by a nut 19. It will now be observed, as shown in Fig. 1, that head 15, with arms 12 and 13, may be moved in any direction in a horizontal plane back and forth, as well as laterallyswinging on pivots 32 and 17. To equalize the lateral strain on these latter as much as possible, 1 provide counterweights 35 at the ends of the arms, of which one projects from each hub. Friction-reducingballs 21 are also provided under these hubs.

Arms 12 and 13 are each attached to cylinder 15 so as to be in a vertical plane, one below the other, and they are also connected to each other in a manner that if one is moved on its pivotal connection to member 15 the other one moves also on said member. This movement is one in a plane at right angles to that in which head 15 moves, and as between the arms it is one in opposite directionthat is, if the upper arm is pushed down the lower one rises up and approaches the former. This movement is obtained by links 22, hingedly attached at each end and connecting each arm to a push-rod 23, which, with its inner enlarged part 24, is fitted into the pivotally-supported head 15. Behind this enlarged part 2 1 there is a spring 26, which by acting against this part and push-rod 23 holds arms 12 and 13 in a certain normal position and apart from each other, as shown in Fig. 3. The partlyclosed end 25 of cylinder 15 prevents the spring from pushing part 2 1 entirely out of this latter.

Bracket 18, which supports the entire device, is by preference attached to the table upon which the lumber rests while being manipulated. This table consists of two sections 27,

with a gap between them, in which the implement may be swung for adjustment and manipulated for use and as best shown in Figs. 1 and 2. The tops of these table-sections are formed of rollers 28 to facilitate the handling of the lumber 29 as the same is advanced laterally through the space between the arms. Bracket 18 is shaped and connected in a manner in which it serves also to connect the two table-sections for the purpose of holding them in proper position with reference to each other. This connection may be strengthened by additional braces 31.

The device is used as follows: A piece of lumber 29, which is to be subdivided and cut up, is placed upon the table for the purpose of having its defects marked so that the cuttinglines along which the lumber is to be divided may be properly located with reference to these defects. It is presumed to be necessary that notice be taken of the defects on both sides. To bring them as to their location simultaneously before him, the operator proceeds by moving the particular piece of lumber until the first defective spot on its upper side arrives in the gap of the table, the lumher being also between arms 12 and 13, as shown in Fig. 3. The upper point 10 is now lowered against side A of the lumber, and said point is now run around the defective spot, as shown in Fig. 1, so as to properly locate the same. This may be readily done because the compound pivotal connection of head 15 permits said point to be freely moved over the board in all directions between the gap of the table-sections. This lowering of point 10 causes at the same time point 11 below to rise against and in contact with the under surface B of the board, as shown in Fig. 2, after which in any lateral movenient said points move togetherthat is, one follows the other. Point 11 being directed upwardly, it is clear that whatever lines are described by point 10 on the upper surface A will be exactly reproduced by point 11 on the under surface B. In this manner all defects on side A are traced and simultaneously transferred and copied onto side B, so that when the board is now turned over to brin side B uppermost this latter side will not only show its own defects, but shows also the defects of the other side as they are represented by the copies of their tracings and which occupy a position exactly like the position of the corre-- sponding real defects on the other side. Lines to mark cuts along which the board is to be subdivided may now be intelligently arranged and run, because all defects are now simultaneously before the operator. These marking-lines are produced by other meansas, forinstance, by rules, gages, squares, straightedges, 'or by either of my two patented marking-machines mentioned-and as far as this present device is concerned its use on this particular board is now at an end.

IIO

All or part of the lower arm'13 is preferably elastic, so as to be free to eXert a slight pressure, whereby the pencil or chalk is maintained in marking contact and caused to follow any unevenness in the surface of the board. I do this by forming the outer part of arm 13 out of a piece of steel 32 attached thereto and which at its free end carries the holder for the lower point 11.

Having described my invention, I claim as new 1. In aduplicating defect-tracer for the purpose described, the combination of a support for the material, a tracer-point, an arm on which it is supported in a manner to be free to be moved over the material on one side thereof after brought in contact-therewith, a transfer-point adapted to be brought simultaneously in contact with the other side of the material, both points being arranged to point toward each other,an intermediate member to which both points are connected in a manner that one follows the movement of the other over the surface of the material after in contact therewith, a movable pivot on which this latter member is supported and a swinging arm permanently attached to the support for the material and carrying at its other end the movable pivot mentioned.

2. In a d uplicating defect-tracer for the purpose described, the combination of a tracing and a transfer point, means whereby the material is supported between them, arms at one end of each of which these points are carried, one being arranged below the other, an intermediate member to which the other ends of each of these arms are attached, an arm permanently attached by means of a pivot and to' which this intermediate member is pivotally attached so that the two arms may be simultaneously swung about either of the two pivots and means connecting the arms in a manner that if one arm is moved in a direction toward the other arm, this latter is caused to move also but in a direction opposite to the other arm.

3. In a duplicating defect-tracer for the pu rpose described, the combination of a tracing and a transfer point, one cooperating with the other, means whereby the material is supported between them, arms at one end of which these points are carried, one below the other, a member 15, to one end of which the other ends of these arms are attached, a hub 16, at the other end of this member 15, an arm 33, having a hub at each end, to one of which hub 16 is connected for support and a bracket permanently attached to the support for the material and to which the other hub connects for support.

4. In a duplicating defect-tracer for the purpose described, the combination of a tracing and a transfer point, arms at one end of each of which one of these points is carried, one below the other and one cooperating with the other, means to support the material between them, an arm 15, to which the other ends of the arms first mentioned are attached, a hub at the other end of arm 15, an arm 33 having a hub at each end and on one of which hub 16 is supported, a bracket permanently attached to the support for the material and which supports the other hub and counterweights carried on these hubs at a point opposite to where the arms project therefrom.

In testimony whereof I hereunto set my signature in presence of two witnesses.

EDW'IN M. SCHANTZ.

Witnesses:

H. EMILLIES, A. M. GRAHAM. 

